xml/impl/src/com/intellij/ide/highlighter/XmlLikeFileType.java

   1 /*
   2  * Copyright 2000-2009 JetBrains s.r.o.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16 package com.intellij.ide.highlighter;
  17
  18 import com.intellij.lang.Language;
  19 import com.intellij.openapi.fileTypes.LanguageFileType;
  20 import com.intellij.openapi.project.Project;
  21 import com.intellij.openapi.vfs.CharsetToolkit;
  22 import com.intellij.openapi.vfs.VirtualFile;
  23 import com.intellij.xml.util.XmlUtil;
  24 import org.jetbrains.annotations.NotNull;
  25 import org.jetbrains.annotations.Nullable;
  26
  27 import java.nio.charset.Charset;
  28
  29 public abstract class XmlLikeFileType extends LanguageFileType {
  30   public XmlLikeFileType(Language language) {
  31     super(language);
  32   }
  33   public String getCharset(@NotNull VirtualFile file, final byte[] content) {
  34     String charset = XmlUtil.extractXmlEncodingFromProlog(content);
  35     return charset == null ? CharsetToolkit.UTF8 : charset;
  36   }
  37
  38   public Charset extractCharsetFromFileContent(final Project project, @Nullable final VirtualFile file, @NotNull final String content) {
  39     String name = XmlUtil.extractXmlEncodingFromProlog(content);
  40     Charset charset = CharsetToolkit.forName(name);
  41     return charset == null ? CharsetToolkit.UTF8_CHARSET : charset;
  42   }
  43 }